KR101400583B1 - Measurement reporting of neighbor cells - Google Patents

Abstract

In a user device, individual measurements of a set of measurements of a neighboring cell are associated with individual code points defining a step size 303 that is associated with the threshold 301 and dynamically determined from a set of possible step sizes. The code points to which the measurements are associated are compiled into a measurement report sent to the network. In the network, a codepoint step size 303 is sent to the user equipment transmitting the measurement report to the network. Thus, the step size is dynamically determined from a set of possible step sizes. The network selects one of the neighboring cells for handover of the UE based on the measurement report. In one embodiment, the threshold value 301 is determined from the offset value transmitted by the network to the user equipment. The method, apparatus and stored computer program are described in terms of both a user equipment and a network side embodiment.

Description

{MEASUREMENT REPORTING OF NEIGHBOR CELLS}

An exemplary, non-limiting embodiment of the present invention relates to a wireless communication system, method, apparatus and computer program, and more particularly, to reporting a neighbor cell's measured value in a wireless communication system, For example, an E-UTRAN cell report in GERAN).

This section is intended to provide a context or context for the invention as set forth in the claims. The description herein may include concepts that can be performed but are not necessarily those that were previously designed or executed. Accordingly, unless otherwise stated herein, what is described in this section is not a prior art description of the present application and the claims, and is not admitted to the prior art by being included in this section.

The following abbreviations which may be found in the present specification and / or drawings are defined as follows:

3GPP third generation partnership project: 3rd Generation Partnership Project

BCCH broadcast control channel: broadcast control channel

BSC base station controller:

BSIC base station identity code: base station identification code

BSS base station subsystem:

BTS base transceiver station:

DL downlink (BTS / eNB towards UE): Downlink (BTS / eNB towards UE)

EDGE enhanced data rates for GSM evolution eNB EUTRAN Enhanced data rate (Evolved Node B, base station / access node) for GSM Evolution eNB EUTRAN Node B Evolved Node B,

E-UTRAN evolved UMTS radio access network (also termed LTE / 3.9G) E-UTRAN evolved UMTS radio access network (also termed LTE / 3.9G)

FDD frequency division duplex

GERAN GSM / EDGE radio access network (also known as 2.5G): GSM / EDGE radio access network (also known as 2.5G)

Global System for Mobile Communications

Identity identity: Identity

LTE long term evolution: Long term evolution

MS mobile station (also termed UE): mobile station (also called UE)

NB node a (base station / access node): Node B (base station / access node)

PCID physical layer cell ID: physical layer cell ID

RAT radio access technology

RSRP reference signal received power

RSRQ reference signal received quality:

SC-FDMA single carrier, frequency division multiple access: single carrier, frequency division multiple access

TDD time division duplex: Time division duplex communication

TTI transmission time interval: Transmission time interval

UE user equipment (also termed MS): user equipment (also named MS)

UL uplink (UE towards eNB): UL (UE toward eNB)

UMTS universal mobile telecommunication system:

UTRAN UMTS radio access network (also known as 3G): UMTS radio access network (also known as 3G)

A communication system known as Evolved UTRAN (E-UTRAN) (also referred to as UTRAN-LTE or E-UTRA) is currently under development in 3GPP. As currently specified, the DL connection technology will be orthogonal frequency division multiple access (OFDMA) and the UL access technology will be single carrier frequency division multiple access (SC-FDMA).

3GPP TS 36.300, V8.6.0 (2008-09) (Technical Specification Group Radio Access Network: Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)) is one important specification.

1 is a schematic diagram of a mobile station (MS) under the control of a base transceiver station (BTS) of the GERAN system via an Um link; In the GERAN system, the BTSs are under the control of a base station controller (BSC) which communicates with the GSM / UMTS core network over at least the Gb and A interfaces as shown. Also shown in Figure 1 are six neighboring access nodes, some of which are GERAN BTSs, some are UTRAN NBs, and some are E-UTRAN eNBs. The MS measures the serving GERAN BTS with the Um interface and measures its neighboring access node (RAT) compatible with the MS and sends the measurement report to the serving BTS. Similarly, the MS may instead be under the control of the UTRAN network and may transmit the measurement report of its own serving UTRAN NB and the measurement reports of neighboring GERAN BTSs and E-UTRAN eNBs to the serving NB of the UTRAN network . Any of these inter-RAT measurement reports is illustrative and is a non-limiting environment for such an embodiment.

As the E-UTRAN is adopted as a new radio technology (RAT), the mobile terminals are allowed to operate in both the existing system and the E-UTRAN infrastructure systems such as the environment shown in FIG. 1, Lt; RTI ID = 0.0 > MS) < / RTI > Measurement reports for E-UTRAN cells identify important aspects for GERAN / E-UTRAN interworking standardized in 3GPP Release 8.

Convention in GERAN # 38bis for Utilization of Blacklist Access among E-UTRAN Neighboring Cells (Priority Document Filed on November 10, 2008 Proposed Document A Attached to US Provisional Application No. 61 / 198,859 A: Document G2-080368 (entitled (See, for example, 3GPP TSG GERAN2 # 38bis, Xi'an, China; June 24-27, 2008; by Nokia Corporation and Nokia Siemens Networks ) (See Section 3 of that document, which states that only neighboring cells are signaled whether they should be regarded as reselection candidates), the IDs of the allowed cells are not explicitly transmitted and therefore the mobile unit simply While it is not possible to indicate a cell, while it is available in a whitelist approach used for state-of-the-art neighbor cell reporting for GERAN or UTRAN cells.

This means that the entire physical layer cell identifier (PCID) of the E-UTRAN cell should be included in the measurement report. This appears to reduce the efficiency of neighbor cell measurement reporting for E-UTRAN cells. Regardless of whether this blacklist approach is actually more efficient or less efficient, it is an agreed framework for forwarding measurements between RATs. As a result, the design of new measurement report messages is needed to obtain the best reporting efficiency.

MEASUREMENT REPORT or ENHANCED MEASUREMENT REPORT in dedicated mode or dual transmission mode to reduce the impact of introduction of E-UTRAN to mobile terminal; And GERAN to E-UTRAN, GERAN is considered to reuse existing measurement report message formats such as PACKET MEASUREMENT REPORT or PACKET ENHANCED MEASUREMENT REPORT in packet transmission mode.

By reusing existing measurement report message formats, constraints on the report itself are naturally imposed to fit these existing formats. In particular, the ID of the E-UTRAN cell is represented by a PCID requiring 9 bits, which is 3 bits larger than that used for BSIC identification in GERAN. As a result, the 6-bit measured value report amount used for reporting on the GERAN or UTRAN cell needs to be reduced to 3 bits to allow this access when reporting to the E-UTRAN cell. Details in this respect are four sections of the document and the document G2-080368 of G2-080510 (entitled ENHANCED MEASUREMENT REPORTING FOR LTE ; 3GPP TSG GERAN2 # 39bis, Sophia-Antipolis, France, Sept 30 th - Oct 3 rd 2008; by Nokia Corporation & Nokia Siemens networks ).

Reduced granularity of reporting volume is currently under discussion in 3GPP between GERAN and RAN 4; The reporting quality can only be three bits. See document B attached to the referenced priority document above (document TSGG # 38 (08) 1347 entitled LS ON REPORTING E-UTRAN MEASUREMENTS; 3GPP TSG GERAN Meeting No. 39, Florence, Italy; 25-29 August 2008 ), Where the report volume may be RSRP (reference signal receive power) or RSRQ (reference signal receive quality).

The contribution to GERAN has provided a basic solution for utilizing reduced 3-bit granularity reporting for E-UTRAN cells. Attached to the above referenced priority document: document GP-081159 (entitled ON MEASUREMENT REPORTING FOR GERAN / E-UTRAN INTERWORKING; 3GPP TSG GRAN # 39, Florence, Italy; 25-29 August 2008; by Nokia Siemens networks & Nokia Corporation) Refer to the submitted submission C. One principle of the proposed encoding of a 3 bit metric is provided herein in Fig. 1 of the reproduced document GP-081159 as shown in Fig.

According to a first aspect of the invention, an individual measure of a set of measurements of a neighboring cell is associated with an individual code point, said code point defining a step size that is dynamically determined from a set of possible and associated step sizes , ≪ / RTI &

Compiling the code point with which the measurement value is associated into a measurement value report;

And transmitting the measurement report to a network.

According to a second aspect of the present invention there is provided a memory for storing a program of computer readable instructions, wherein the instructions, when executed by a processor, associate an individual measure of a set of measurements of a neighboring cell with a respective code point, The point is to define a step size that is related to a threshold and that is dynamically determined from a set of possible step sizes, and compiling the code point with which the measurement is associated into a measurement value report, Is provided.

According to a third aspect of the present invention there is provided a computer program product comprising at least one processor and at least one memory for storing computer-readable instructions, wherein the at least one memory and the computer- Associating an individual measure of a set of measurements of at least a neighboring cell with a respective code point, the code point defining a step size that is dynamically determined from a set of possible step sizes associated with the threshold, Compiling the associated code point into a measurement value report, and transmitting the measurement value report to a network.

According to a fourth aspect of the present invention there is provided a method for associating individual measurement values of a set of measurements of a neighboring cell with individual code points, said code points defining a step size that is dynamically determined from a set of possible step sizes Processing means for compiling the measurement value into a measurement value report, and processing means for compiling the code point to which the measurement value is associated into a measurement value report, and transmission means for transmitting the measurement value report to the network.

According to a fifth aspect of the present invention there is provided a method comprising: transmitting to a user equipment a code point step size selected from a set of possible step sizes; determining from the user equipment a set of code points associated with individual measurements of a neighbor cell's measurement set , Wherein the code point is associated with a threshold value and wherein the code point is associated with a threshold value based on the received measurement report, And selecting one of the plurality of memory cells.

According to a sixth aspect of the present invention there is provided a memory for storing a program of computer readable instructions, the instructions comprising instructions for: transmitting to a user device a code point step size selected from a set of possible step sizes, From the user equipment, a measurement report comprising a set of code points associated with individual measurements of a set of measurements of a neighboring cell, the code point comprising: an operation associated with a threshold value; Selecting one of the neighboring cells for handover of the user equipment on which the measured value report is received,

According to a seventh aspect of the present invention, there is provided an apparatus comprising: at least one processor; Wherein the at least one memory and the computer readable instructions are executable by the at least one processor to cause the device to generate a code point step size that is selected from at least a set of possible step sizes, And receiving from the user equipment a measurement report comprising a set of code points associated with individual measurements of a set of measurements of a neighboring cell, the code point being associated with a threshold value And selecting one of the neighboring cells for handover of the user equipment from which the measurement report is received based on the received measurement report.

According to an eighth aspect of the present invention there is provided an apparatus comprising: transmission means for transmitting a code point step size selected from a set of possible step sizes to a user device; Wherein the code point comprises receiving means associated with a threshold value and means for determining, based on the received measured value report, whether the measured value report comprises a set of < RTI ID = 0.0 > There is provided an apparatus comprising processing means for selecting one of neighboring cells.

These and other aspects of the invention are described below.

1 illustrates a GERAN system architecture in which some neighboring access nodes for a MS correspond to a GERAN system and other neighboring access nodes for the same MS correspond to an E-UTRAN system.
Figure 2 illustrates reproducing Figure 1 from document GP-081159 showing RSRP encoding for E-UTRAN measurement reporting taking into consideration the reduced reporting resolution of 3 bits.
3 illustrates a variable step size reporting resolution in accordance with an exemplary embodiment of the present invention; Report of code point "0 "; And a code point < RTI ID = 0.0 > of "0 ".< / RTI >
4A shows a simplified block diagram of various electronic devices suitable for use in practicing the exemplary embodiments of the present invention.
Figure 4b shows a more detailed block diagram of a user device as shown in Figure 4a.
5 shows the operation of a method according to certain exemplary embodiments of the present invention, such as the present example in terms of a user device / mobile station transmitting a measurement report, and the results of the execution of computer program instructions implemented on a computer readable memory An exemplary logic flow chart.
Figure 6 illustrates the operation of a method in accordance with certain exemplary embodiments of the present invention, as an example in the context of a network access node receiving a measurement report, and the results of the execution of computer program instructions implemented on the computer readable memory Lt; / RTI >

In order to facilitate interworking between GERAN and E-UTRAN, existing GERAN messages: MEASUREMENT REPORT, PACKET MEASUREMENT REPORT, ENHANCED PACKET MEASUREMENT REPORT, and PACKET ENHANCED MEASUREMENT REPORT are mobile terminals / terminals with both GERAN and E-UTRAN capabilities. It is considered for use by UEs. As described above, when a handover or a cell reselection is required, any network cell (access node) that is not on the black list but is using an explicitly provided frequency may be handed over to the UE by handover A blacklist approach should be made that should be considered as a valid candidate for cell reselection (in dual transmission mode) or cell reselection (in packet transmission mode). In order to support such handover or cell reselection, the user equipment (UE) selects one of its neighbors using any of the above types of neighboring cells that do not exist in the blacklist and use at least one of the frequencies explicitly provided. A measurement report should be sent to the serving access node (e.g., GERAN BTS or UTRAN NB). The center frequency of the E-UTRAN implicitly explains whether the cell using its center frequency operates in a TDD mode or a frequency division duplexed (FDD) mode.

In a dedicated mode or a dual transmission mode, a measurement report using the MEASUREMENT REPORT message format should have a length of 16 octets, and may use any wireless connection technology to evaluate the measurement results in the serving cell in the serving cell for handover of the UE Will carry up to six neighboring cells belonging to the RAT. Currently, the agreed measurement results in the measurement report are RSRP with 98 code points and RSRQ with 34 code points, 7 bits to report RSRP with 1 bit resolution, or 6 bits to report RSRQ I give it. Based on the signaled information by the serving cell, RSRP or RSRQ should be reported by the UE. In this case, the other metric must be greater than or equal to a certain threshold (handover or cell reselection threshold) that the serving cell provides to the UEs in that cell over the broadcast channel (BCCH).

When RSRP is reported and RSRQ is greater than or equal to a predefined threshold for handover or cell reselection, code point "0" is assigned to the RSRP range below the signaling threshold as seen in FIG. 2, It is regarded as not executable as an over-candidate and is not reported. The code points "1" through "6 " cover the RSRP range above the signaling threshold and have a proposed resolution of 3 dB each, as shown in FIG. Code point "7 " is considered to represent the most feasible candidate for handover, covering the range of RSRP exceeding 18 dB above the signaling threshold. Clearly, the lowest resolution is provided for reporting to the cell of the current code point "7 ", a higher resolution is provided for code points" 1 & The fact that it falls below the signaling threshold is always reported in the serving cell. When RSRQ is reported and RSRP is above a predefined threshold for handover or cell reselection, the same type of encoding is predicted for RSRQ.

Due to the 3-bit report granularity shown in Figure 2, the following problems arise:

a. The cell reselection threshold signaled on the BCCH is valid for idle mode UEs and may not be suitable for active mode UEs to identify handover candidates. Thus, such a threshold should be defined independently and signaled to the mobile terminal / UE via dedicated signaling (e.g., using a MEASUREMENT INFORMATION message). The relevant content in this regard is attached to the referenced priority document above as document D R4-082446 (entitled: LTE MEASUREMENT REPORTING IN GSM; 3GPP SG-RAN WG4 Meeting # 48bis; Edinburgh, United Kingdom; 29 September-3 October 2008; by Nokia Corporation & Nokia Siemens Networks ).

b. In Figure 2 attached hereto, the code point "0 " represents a range below the indicated, signaled cell reselection threshold value. Thus, this code point reflects cells that are not considered suitable as handover candidates for the UE in the active mode. However, it is not differentiated whether the reported neighboring cell is close to or close to the threshold value. This network does not receive information as to whether the neighboring cell is measured by the UE to be very close to the threshold but less than the threshold or much lower than the threshold. In addition, cells with this code point are always reported, thus reducing the signaling capacity for other cells (E-UTRAN, GERAN or UTRAN cells) to be reported.

c. The report uses a fixed reporting step size (here 3 dB for code points "1" to "6 " are signaled in 3 bits). This is advantageous when the reporting range covers 18 dB or more, but it is not optimal if the cells are close together if the reporting range is lower and the 3 dB step size is very inaccurate.

d. The reporting range may be different for different E-UTRAN carrier frequencies. This is not yet taken into account in the prior art (see example document GP-081159 attached to the priority document as submission document C).

Most of the contributions in this area,

보고량의 6비트 분해능을 허용하는 ENHANCED MEASUREMENT REPORTING를 사용하거나(그러나, 이러한 특성은 GERAN 네트워크에서 광범위하게 사용되지는 않는다); 또는

Use ENHANCED MEASUREMENT REPORTING to allow 6-bit resolution of the report volume (but these characteristics are not widely used in GERAN networks); or

새로운 측정값 보고 메시지들을 정의하는 것(그러나, GERAN#39에서 새로운 메시지들을 특정하기 전에 우선 E-UTRAN 이웃 셀 보고에 대한 기존의 메시지들을 재사용하는 가능성을 조사하는 것에 합의되었다)으로 가정되어 왔다.

It has been postulated to define new measurement report messages (however, it was agreed to investigate the possibility of reusing existing messages for E-UTRAN neighbor cell reporting first, before specifying new messages in GERAN # 39).

Exemplary embodiments of this content in connection with the problems at points b to d above provide four different aspects that can be combined in any of a variety of combinations or individually. Generally speaking, these aspects include: 1) changing code point "0" so that code point "0 " covers the reporting range immediately below the reporting threshold; 2) below code point "0 ", E-UTRAN neighbor cell is not reported at all; 3) there is an adaptive reporting step size for the inter-RAT measurement report (eg, a range of measurements that a single code point contains); 4) the presence of signaling of each E-UTRAN grain size (center frequency grain size) for the above aspects 1) to 3). These four aspects are described in detail below with reference to FIG.

Code point "0" (reference numeral 300) is changed, thus covering the reporting range immediately below the cell reselection / handover threshold (reference 301) with a predefined fixed step size. The step size 302 of code point "0" (300) is strongly coded in one embodiment, or signaled by the network in another embodiment, or, in another embodiment, Size 303 may be the same. In the exemplary embodiment as shown in Figure 3, all code points 1 to 6 have the same step size 303, except for one or both of the top 7 and the bottom (0) code points .

This aspect is shown in the difference between Figures 2 and 3: in both figures, the code point "0" is reported in the serving cell. The bright shaded portion and the dark shaded portion indicate whether or not the neighboring cell assigned the code point "0 " can be regarded as a valid candidate (light) for handover or cell reselection by the serving cell. In Figure 2, code point "0" is shaded dark; It is not considered a valid handover or cell reselection candidate for the simple reason that it is reported but is below a predetermined threshold value 301. [ However, although the code point "0" (reference numeral 300) in FIG. 3 is close to but still below the predetermined handover threshold 301 by being shaded brightly, Or may be considered a cell re-selection candidate. Generally, the signaled threshold value 301 is signaled by the network / BTS to the various UEs within the cell. The signaled threshold may optionally indicate a code point "0" which is a nominal value or a code point "0 ", which is a low start range value, or any other point that unambiguously defines the actual range of each code point .

Notwithstanding the fact that the code point "0 " (reference numeral 300) is below the handover or cell reselection reporting threshold 301, it is always reported by the UE for a particular E-UTRAN neighbor cell. One technical advantage of this is that the network can utilize this reported code point "0" from various UEs for averaging.

As mentioned briefly above, the predefined threshold values can be implemented in various ways. In one embodiment, there is a signaled nominal value, such as at a code point "0 " at which some cell reselection or handover threshold value 301 is out. In another embodiment, the signaled threshold is the boundary value (in dB) between code point "0" and code point "1 ". In this case, the signaled predetermined threshold, as shown correctly in threshold 301 in FIG. 3, is the actual cell reselection / handover threshold and does not have an offset from the signaled threshold. Further, in another embodiment, the signaled threshold is the lower boundary value of the code point "0" reporting range (this would be a value between 300 and 390, as shown by 301 'in Figure 3) . Each of which may be signaled by the network to the UE and each of which represents differently implementing network signaling such that a predetermined threshold is determined at the UE. If the signaled value or threshold is not an actual predetermined cell reselection / handover threshold 301, the UE determines that the cell reselection / handover threshold is an offset from the signaled predetermined threshold value it receives do. For example, in FIG. 3, the network may signal a value corresponding to 301 'in which the UE is offset to detect a certain threshold value, shown at 301, as a cell reselection / handover threshold.

In the second aspect summarized above, below the code point "0 ", the E-UTRAN neighbor cell is not reported at all in the dark shaded area in FIG. This is because it is not considered to be a suitable handover candidate far below the handover or cell reselection threshold 301 (which is at least as far as the step size of code point "0" at 300). One such non-reporting technical advantage is that if the reporting of E-UTRAN cell 390 below code point "0 " (300) is not viable for handover in any way Lt; / RTI > cells (or additional UTRAN or other RAT cells).

According to a third aspect of the invention summarized above, the report uses an adaptive reporting step size 303 which shows that FIG. 3 can vary between 2 dB and 3 dB (as a non-limiting example). In one embodiment of the third aspect, the reporting step size 303 may be ordered by the network based on, for example, an evaluation of the network for a previous E-UTRAN measurement report received by the network. In another embodiment of this third aspect, the reporting step size 303 may be determined based on a measured amount (e. G., RSRP or < RTI ID = 0.0 > RTI ID = 0.0 > (RSRQ) < / RTI >

Consider an example of this third aspect of the invention. If two reporting step sizes 303 for RSRP are defined (e. G., 2 dB and 3 dB), the mobile station / UE sets a 3 dB or 2 dB reporting step size 303 based on the range 380 of RSRP values Decide whether to use. In one example, this determination is made based on the number of reports that yield code point "7 " (370) for particularly different E-UTRAN neighbor cells. The UE may inform the network of a unique reporting step size 303 for code points "1" through "6 ". For example, if more than one measurement report obtains code point "7" (370) in 2 dB step encoding, the code point " 3 dB step encoding is selected for the step size 303 for "1" to "6" (and possibly also for the code point "0" if it should be the same as the step size 303).

For embodiments in which the network commands a step size (303) via signaling such as the algorithm just described above, the UE will be driven at the access node / base station, not within the UE, It is important to note that they will signal the determined step size.

According to a fourth aspect of the present invention summarized above, the reporting range 380 is different for different E-UTRAN carrier frequencies, for example, a first frequency (frequency 1) for a macrocell layer, UTRAN center frequency (which may be all three, any pair, or any one of the sides individually) since the first to third aspects may be different for different carrier frequencies at the second frequency (frequency 2) (The lower reference point of the reporting range 380) that represents the signaled threshold 301, the code point "0" step size 302, and whether it is in the DL or UL Quot; 1 "to" 6 "step size (303).

Broadly described, embodiments of the present invention provide a technical advantage of using a compression encoding of a metric to improve the efficiency of the reporting of a measured value if the number of reported cells can be increased. This technical advantage can also be used for UTRAN and other wireless radio interfaces to improve measurement reporting efficiency.

(Limited) reporting range may be set in some embodiments such that the actual handover / cell reselection threshold is in the middle of the range or at least close to the midpoint. This can be established regardless of whether the reference is a nominal value of code point "0 " or whether it is set as shown in FIG. This approach is seen to give a minimum value of the averaged value at the eNB of the correct handover / cell reselection decision point. These measurements vary naturally, and if the handover / cell reselection threshold is precisely at the boundary of code point "0", then a few reports will be missed if the natural signal variation moves one bit below the code point "0" It is predicted that the above situation will occur.

Since the step size is dynamically controlled according to certain embodiments presented herein, it may be easiest to determine the reporting range reference level for a nominal value of code point "0 ", and thus code point n (e.g., 1 to 7 will have a nominal value of code point "0 " plus n times the aforementioned granularity (e.g., 2 or 3 dB). The reporting range for each code point can range from the nominal value minus one-half the step size to the nominal value plus one half the step size, in which case the highest code point (code point 7) Lower values may be included and higher values may be excluded, or vice versa, except that the range will extend to infinity. Here, the lowest code point will have the same range as described above.

Consider the example above. If the nominal values are between -90 dBm and -76 dBm (2 dB steps) and each code point covers a reporting range of +/- 1 dB around a nominal value, the threshold is -90 dBm (code point "0 &Quot;), or to indicate-89 dBm (the boundary level between code points 0 and 1, as in FIG. 3) or to point to any other code point within the reporting range approximately the same have. In theory, this may extend beyond the reporting scope. Thus, there are many ways to implement this content whether the signaled value is at the boundary of two code points, at the handover / cell reselection threshold, or at the midpoint of one or more reporting ranges. An important concept is that the signaled value sets a certain threshold value at which the step size and range of code point "0 " is detected.

In all embodiments, the handover / cell reselection threshold value should be directly indicated in the embodiment, since the parameters signaled to the UE that sets the reporting range and handover threshold from the network may indicate any location when clarifying the above example Quot; report range threshold parameter "rather than a handover threshold parameter.

Reference is made to Fig. 4A, which illustrates a simplified block diagram of various electronic devices and apparatus suitable for use in practicing any of the four aforementioned aspects of the invention and their various exemplary embodiments / modifications. 4A, a wireless (GERAN) network 1 is connected to a device such as a mobile communication device, which may be referred to as a UE 10, via a network access node, such as the BTS 12 of the GERAN system, Lt; / RTI > The network 1 may include a network control component (BSC) 14 in communication with a GERAN core network (CN) 16 similar to that shown in Fig. The CN 16 may communicate the BTS 12 and the BSC 14 to the E-UTRAN network and / or the broadband-based data communication network (e.g., the Internet) and / or the public switched telephone network And other networks such as the Internet. The UE 10 comprises a computer readable memory medium embodied in a memory (MEM) 10B storing a controller, such as a computer or data processor (DP) 10A, a program (PROG) And a suitable radio frequency (RF) transceiver 10D for performing bidirectional wireless communication with the BTS 12 via an antenna. The BTS 12 also includes a computer readable memory medium embodied in a computer (MEM) 12B that stores a controller, such as a data processor (DP) 12A, a program (PROG) And an appropriate RF transceiver 12D for communicating with the UE 10 via one or more antennas. The BTS 12 is connected to the BSC 14 via a data / control path 13. The path 13 may be implemented with the Gb interface shown in FIG. The BTS 12 may also be connected to another BTS via a data / control path 15 that may be implemented with the Iur-g interface shown in FIG.

It is assumed that at least one of the programs 1OC and 12C includes program instructions that, when executed by an associated DP, cause the device to operate in accordance with exemplary embodiments of the invention, as discussed in more detail below.

That is, exemplary embodiments of the present invention may be implemented, at least in part, in computer software executable by the DP 10A of the UE 10 and / or the DP 12A of the BTS 12, (And firmware).

In order to illustrate an exemplary embodiment of the present invention, the UE 10 measures RSRP / RSPQ, associates individual measurements from individual neighboring cells with code points, and transmits the code points to a measurement report And a reference signal measurement unit 10E for compiling the reference signal measurement unit 10E. The BTS 12 or BSC 14 also receives a measurement report from the receiver 12D, determines a measurement of the neighboring cell from the code point, and determines a measurement value < RTI ID = 0.0 > And a report decoder 12E. It is also a decision to decide not to handover the UE to any of the neighboring cells, which is done if the reported RSRP / RSPQ is not strong enough yet to justify handover from the serving access node. Either of the units 10E / 12E may be functionally placed within the associated DP 10A / 12A or 14A or if it is not logically disposed within any of the many function-specific chips shown in Figure 4B .

In general, various embodiments of the UE 10 may include a portable unit or terminal including a combination of the following functions: a cellular phone, a personal digital assistant (PDAs) with wireless communication capability, a portable computer with wireless communication capability, But are not limited to, video capture devices such as digital cameras with capabilities, game devices with wireless communication capabilities, music storage and playback devices with wireless communication capabilities, Internet devices that allow wireless Internet access and browsing Do not.

The computer readable memories (MEMs) 1OB and 12B or 14B may be any form suitable for a local technical environment, and may be any of a variety of types, including semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, And removable memory. The DPs 10A and 12A or 14A may be any form suitable for a local technical environment and may include one or more of a general purpose computer, a special purpose computer, a microprocessor, digital signal processors (DSPs), and processors based on a multi- As a non-limiting example.

FIG. 4B illustrates the exemplary UE in more detail with a top view (left) and a sectional view (right), and the present invention may be implemented with one or a combination of many such function-specific components. 4B, the UE 10 includes a graphical display interface 20 and a user interface 22 exemplified by a keypad, but may also include a touch screen technology of the graphical display interface 20 and a voice recognition technology . ≪ / RTI > The power driver 26 controls the device to be turned on and off by the user. Exemplary UE 10 is shown facing forward (e.g., for video communication), but alternatively or additionally (e.g., to acquire video and video for local storage) As shown in FIG. The camera 28 includes a shutter driver 30 that may alternatively function as a volume controller for the speaker (s) 34 when the camera 28 is not in the active mode and an optional zoom driver 30 ).

The cross-sectional view of Figure 4B illustrates a number of transmit / receive antennas 36 that are typically used in cellular communications. Antenna 36 may have multiple bands for use with other wireless devices within the UE. Although the ground plane may be limited to a small area, such as in some embodiments where the power chip 38 is disposed on the printed wiring board on which the power chip 38 is formed, the operable ground plane for the antenna 36 may be located in the entire space surrounded by the UE housing Lt; / RTI > The power chip 38 controls the power amplification and amplifies the received signal on the transmitted channel and / or through the transmitting antenna at the same time when spatial diversity is used. The power chip 38 outputs the amplified received signal to a radio frequency (RF) chip 40 that demodulates and downconverts the signal for baseband processing. The baseband (BB) chip 42 detects the signal that is converted into a bitstream and finally decoded. A similar process is performed inversely to the signal generated and transmitted from the device 10.

The signal transmitted to the camera 28 and received from the camera 28 is passed through an image / video processor 44 which encodes and decodes various image frames. A separate audio processor 46 may be present to control the signal output to the speaker 34 and input from the microphone 24. [ The graphical display interface 20 may include a user interface chip 20 that may output to and display on the display interface 20 and / or may further process user input from the keypad 22 or elsewhere. (50), it is refreshed from the frame memory (48).

Some embodiments of the UE 10 include wireless local area network (WLAN) wireless device 37 and Bluetooth 占 wireless device 39, such as a wireless local area network (WLAN) wireless device 37, which may incorporate an antenna on a chip, Devices may also be included. There are a variety of memories throughout the device and may be used for various purposes such as, for example, RAM 43, ROM 45 and exemplary memory card 47 in which various programs 10C are stored in some embodiments. And removable memory. All of the components within the UE 10 are typically powered by a portable power supply such as a battery 49.

If the processors 38, 40, 42, 44, 46 and 50 described above are implemented as separate entities within the UE 10 or the BTS 12 or BSC 14, And may operate in a slave relationship with a main processor 10A, 12A or 14A. In one particular embodiment of the present invention, the BB chip 42 delivers accurate measurement results without limit of range, and the main processor 10A generates a signaling message, at which the main processor determines the step size and threshold From the point of view of < / RTI > a limited number of code points and associated mappings. However, other embodiments need not be arranged between the BB and the main processors, but may be arranged through separate or various chips and memories, such as those shown or arranged in other processors that combine some of the functionality described above with respect to FIG. Be careful that you can. Any or all of the various processors of FIG. 4B may access one or more of the various memories that may be embedded in the chip or separately from the processor in conjunction with the processor. Similar functional-specific components that are induced to communicate over a wider band of networks than the piconet (e.g., components 36, 38, 40, 42 to 45 and 47) May be placed in an exemplary embodiment of an access node 12 that may have an array of mounted antennas. It should be noted that the various chips described above (e.g., 38, 40, 42, etc.) may be merged into fewer than the number described and, in the simplest case, all of them may be physically implemented in one chip .

5 is a logic flow chart illustrating the operation of a method and the results of execution of computer program instructions in accordance with an exemplary embodiment of the present invention as described in the following paragraphs. It should be apparent based on the foregoing description that an exemplary embodiment of the present invention provides a method, apparatus and computer program (s) in terms of a UE or its components, and that such methods, apparatuses, Each set of values of the set of values is associated with an individual code point (block 502) where each code point is associated with a predetermined threshold value, and the code point to which the measure is associated is compiled into a measure report containing code points above a predetermined threshold value (Block 504), where the measurement report includes an additional code point immediately below a predetermined threshold value associated with a measurement report of another neighboring cell (block 504a); And a code point greater than or equal to a predetermined threshold value defined by the dynamically determined step size (block 504b).

In yet another embodiment of the exemplary embodiment from the UE's point of view summarized above, the measurement report includes additional code points immediately below a predetermined threshold value (e.g., code point "0") and a dynamically determined step size Lt; RTI ID = 0.0 > defined by < / RTI >

In yet another embodiment from the point of view of the UE summarized in either of the above paragraphs, the additional code point may be fixed, received from the serving cell in which the measurement report is transmitted, or dynamically determined Has a step size equal to the step size (each of which is at block 506).

In another embodiment from the point of view of the UE summarized in any of the above paragraphs, the measurement report is farthest above a predetermined threshold value relative to all other code points in the measurement report (and also in the arbitrary (E. G., Code point "7 ", see block 508) with a step size greater than the dynamically determined step size . In another exemplary embodiment, as shown in FIG. 3, the lowest code point may have a different step size 302.

In another embodiment from the point of view of the UE summarized in any of the above paragraphs, the dynamically determined step size is determined in the UE based on a set of measurement reports and measurements of the strongest signal. In an alternative embodiment to this, the dynamically determined step size is received by the UE from the serving access node that the UE sends measurement reports (each of which is shown at block 510) For example, 2 dB and 3 dB).

In another embodiment from the point of view of the UE summarized in any of the above paragraphs, the measurement report includes additional code points just below a predetermined threshold and code points limited only to code points above a certain threshold.

In yet another embodiment from the point of view of the UE summarized in any of the above paragraphs, the UE is in an active mode as opposed to an idle mode.

In another embodiment from the point of view of the UE summarized in any of the above paragraphs, there is a signaled value in which a measurement report from which the UE determines a predetermined value is received from the serving serving cell. In a particular embodiment, the signaled value is received via dedicated signaling (e.g., see block 512, using a MEASUREMENT INFORMATION message received from the serving cell). In one particular embodiment, the received value is a predetermined value (e.g., a cell reselection threshold or a handover threshold), and in another embodiment, the received value is a boundary value of one of the code points, And the UE determines a predetermined value (e.g., handover / cell reselection value) by being offset from the received value. The offset between the signaled value / threshold and a predetermined threshold (actual handover / cell reselection threshold) is illustrated in FIG. 3, where the signaled value / threshold can be 301 ' The selection threshold may be 301 offset from the signaled threshold 301 '.

In another embodiment from the point of view of the UE summarized in any of the above paragraphs, the measurement report is specific to the center frequency at which the measurement report is obtained. In a variation of this embodiment, the step size dynamically determined from the serving cell in which the measurement report is transmitted; A predetermined threshold value; And a step size of an additional code point (each of which is shown in block 514).

In yet another embodiment from the point of view of the UE summarized in either of the above paragraphs, the UE may determine, within its measurement report, Only those measures within the range defined by one of the code points are included.

In another embodiment from the point of view of the UE summarized in any of the above paragraphs, the neighboring cells comprise at least one access node of the GERAN system and at least one access node of the E-UTRAN system; All neighbor cells associated with code points within the measurement report are selected to be included in the measurement report based on the absence on the blacklist stored in the UE ' s local memory.

Based on the foregoing description, an exemplary embodiment of the present invention provides a method, apparatus and computer program (s) in the context of a serving access node (e.g., a GERAN BTS) or a component thereof, And that the method, apparatus, and computer program are each associated with a respective measurement of a set of measurements of a neighboring cell and wherein the code point comprises a set of code points associated with a predetermined threshold, (Block 602), the measurement report includes an additional code point immediately below a predetermined threshold associated with the measurement report of the other neighbor cell; And a code point greater than or equal to a predetermined threshold value defined by a dynamically determined step size and also selects one of the neighboring cells based on the measurement report for handover of the UE to which the measurement report is received (Block 604).

In another embodiment of the exemplary embodiment from the perspective of the access node summarized above, the measurement report may be dynamically generated with additional code points immediately below a predetermined threshold (e.g., code point "0 ", see block 604a) The neighbor cell associated with the additional code point (e.g., code point "0") includes all of the code points beyond the predetermined threshold value defined by the determined step size (block 604b) (Block 604c), but is considered in the averaging process associated with successive measurement reports at the access node in the same manner as for all other reported code points.

In another embodiment from the perspective of the access node summarized in any of the above paragraphs, the additional code point has a step size (block 606) that the access node transmits to the UE, (E.g., 2 dB and 3 dB).

In another embodiment from the perspective of the access node summarized in any of the above paragraphs, the measurement report is farthest above a certain threshold relative to all other code points in the measurement report (E. G., Code point "7") having a step size greater than the dynamically determined step size, associated with the measurement of the most robust signal for any of the above. In this example, it is determined that the neighbor node associated with the additional code point is a candidate suitable for handover or cell reselection (block 608) or in the case of multiple cells to which this code point is assigned. In another exemplary embodiment, as shown in FIG. 3, the lowest code point may have a different step size 302.

In another embodiment in terms of an access node summarized in either of the above paragraphs, the dynamically determined step size is determined by the access node and signaled to the UE (block 610).

In another embodiment from the perspective of the access node summarized in any of the above paragraphs, there is a signaled value or threshold value transmitted by the access node to the UE from which the measurement report is received, and in a particular embodiment, The value / threshold value is transmitted via dedicated signaling (e.g., a MEASUREMENT INFORMATION message sent from the access node, block 612). In one particular embodiment, the signaled value is a predetermined value itself (e.g., a cell reselection threshold or handover threshold), and in other embodiments the signaled value is a boundary value of one of the code points, And the predetermined value (e.g., handover / cell reselection value) is offset from the signaled value. The offset between the signaled value / threshold and a predetermined threshold (actual handover / cell reselection threshold) is illustrated in FIG. 3, where the signaled value / threshold can be 301 ' The selection threshold may be 301 offset from the signaled threshold 301 '.

In another embodiment from the point of view of the access node summarized in any of the above paragraphs, the measurement report is specific to the center frequency with which the measurement report is associated. In a variation on this embodiment, before receiving the measurement report, the access node sends a measurement report to the UE from which the measurement report is received, the dynamically determined step size; A predetermined threshold value; And the step size of the additional code point (each shown in block 614).

In another embodiment from the perspective of the access node summarized in either of the above paragraphs, the access node sends a blacklist of neighboring cells to the UE from which the measurement report was received before receiving the measurement report, Excludes code points associated with any cell on the transmitted blacklist.

The various blocks shown in Figures 5 and 6 are shown as a number of combined circuit components configured to perform with the method steps and / or operations resulting from the operation of the computer program code and / or the associated function (s) Can be.

In general, the various illustrative embodiments may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, but the invention is not so limited. While various aspects of the exemplary embodiments of the present invention may be illustrated and described with block diagrams or flowcharts or using some other representation, such blocks, devices, systems, techniques, or methods described herein may be embodied in, Which may be implemented in hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof.

It is therefore to be understood that at least some aspects of the exemplary embodiments of the present invention may be implemented in various components such as integrated circuit chips and modules, and that the exemplary embodiments of the present invention may be implemented in an apparatus embodied in an integrated circuit . An integrated circuit or circuits may be implemented as one or more data processors or data processors, a digital signal processor or processors, a baseband circuit, and a radio frequency circuit, which may be configured to operate in accordance with an exemplary embodiment of the present invention Circuitry (as well as firmware, if possible) for implementing the circuitry.

Various modifications and adaptations of the above described exemplary embodiments of the present invention will become apparent to those skilled in the art in view of the foregoing description when read in conjunction with the accompanying drawings. However, it will be understood that any and all variations will be within the scope of the non-limiting and exemplary embodiments of the invention.

For example, while the exemplary embodiment has been described above in the context of interworking between GERAN and E-UTRAN (UTRAN-LTE) systems, the exemplary description of the present invention is intended only for interworking between these particular types of wireless communication systems It is to be understood that they are not limited and can be advantageously used in other mobile communication systems, for example in conjunction with other wireless communication systems such as WLAN, UTRAN, GSM alone or in conjunction with another separate communication system.

The terms "coupled "," coupled ", or any variation thereof, may refer to any connection or combination, either direct or indirect, between two or more components, The presence of one or more intermediate elements between the < RTI ID = 0.0 > The coupling or connection between the components may be physical, logical, or a combination thereof. As used herein, the two components may include one or more wires, cables (not shown) as well as electromagnetic energy such as electromagnetic energy having wavelengths in the radio frequency region, the microwave region, and the optical Connected "or" coupled " to each other by using a printed and / or printed electrical connection as a non-exhaustive example in a number of non-exhaustive and non-exhaustive embodiments.

In addition, various names used in the described parameters (e.g., code points, BSIC, RSRP, RSRQ, etc.) are not intended to be limiting in any way as these parameters may be identified by any appropriate name. In addition, some of the features of the various non-limiting and exemplary embodiments of the present invention may be advantageously used without the corresponding use of other features. Accordingly, the foregoing description should be regarded as illustrative of, not limiting of, the principles, features, and exemplary embodiments of the invention.

Claims (4)

A method performed by a user device,
Associating an individual measure of a set of measurements of a neighboring cell with an individual code point, the code point defining a step size associated with the threshold and dynamically determined from a set of possible step sizes -- Wow,
Compiling the code point associated with the measurement in a measurement report;
And sending the measurement report to a network
Way.
A memory for storing a program of computer readable instructions that when executed by a processor causes an operation to occur,
The operation includes:
Associating individual measurements of a set of measurements of a neighboring cell with individual code points, the code points defining a step size associated with the threshold and dynamically determined from a set of possible step sizes;
And compiling the code point with which the measurement value is associated into a measurement value report
Memory.
In the apparatus,
At least one processor,
And at least one memory for storing computer readable instructions,
Wherein the at least one memory and the computer readable instructions cause the device to:
Associating individual measurements of a set of measurements of a neighboring cell with individual code points, the code points defining a step size associated with the threshold and dynamically determined from a set of possible step sizes;
Compiling the code points with which the measurements are associated into a measurement report,
And to transmit the measurement report to the network
Device.
Means for associating an individual measure of a set of measurements of a neighboring cell with a respective code point, the code point defining a step size associated with the threshold and dynamically determined from a set of possible step sizes;
Processing means for compiling the code point with which the measurement value is associated into a measurement value report;
And transmission means for transmitting the measurement value report to a network
Device.

Images